Binary-phase acoustic passive logic gates

Yin Wang,Xiao-Jun Liu,Shou-Qi Yuan,Hong-Xiang Sun,Jian-Ping Xia

doi:10.1038/s41598-019-44769-0

Abstract

The recent rapid development of acoustic logic devices has opened up the possibilities of sound computing and information processing. However, simultaneous realization of acoustic logic devices with subwavelength size, broad bandwidth and passive structure still poses a great challenge. To overcome it, we propose a subwavelength acoustic logic gate which consists of binary-phase passive unit cells placed into a multi-port waveguide. Based on the phase manipulations of the unit cells, we experimentally and numerically realize three basic logic gates OR, NOT and AND, and a composite logic gate XOR with a uniform threshold of 0.4 Pa based on linear acoustic interferences. More importantly, We also design a composite logic gate XNOR by a four-port waveguide, and composite logic gates NOR and NAND and a logic operation A⊙(B+C) based on two logic gates. We demonstrate a 0.6λ-length, 0.3λ-width, and 0.2-fractional bandwidth acoustic logic gate constructed by passive structures, which may lead to important advances in various applications, such as acoustic computing, acoustic information processing and integrated acoustics.

Highlights

The recent rapid development of acoustic logic devices has opened up the possibilities of sound computing and information processing
To realize acoustic logic gates with broad bandwidth, Zuo et al.[49] have designed an acoustic logic gate based on multi-port circular waveguides, in which its working bandwidth is larger than 5 kHz and all logic functions and a complex logic operation can be realized by modulating signal phases
We propose a subwavelength acoustic logic gate which consists of binary-phase passive unit cells placed into a multi-port waveguide

Summary

Introduction

The recent rapid development of acoustic logic devices has opened up the possibilities of sound computing and information processing. Based on the phase manipulations of the unit cells, we experimentally and numerically realize three basic logic gates OR, NOT and AND, and a composite logic gate XOR with a uniform threshold of 0.4 Pa based on linear acoustic interferences. By using the SCs, Bringuier et al.[30] have designed logic gates NAND, XOR and NOT based on the linear interferences of input and control signals. We propose a subwavelength acoustic logic gate which consists of binary-phase passive unit cells placed into a multi-port waveguide. Based on the phase manipulations of the unit cells, we design the basic logic gates OR, NOT and AND, and two composite logic gates XOR and XNOR with a uniform threshold of 0.4 Pa based on the linear acoustic interferences, and the fractional bandwidth (the ratio of the bandwidth to the center frequency) can reach about 0.2. We present the realizations of two composite logic gates NOR and NAND and a logic operation A⊙(B+C) based on two logic gates

Methods

Results

Conclusion